摘要:
In a method of manufacturing a semiconductor device such as a flash memory device, an insulating pattern having an opening is formed to partially expose a surface of a substrate. A first silicon layer is formed on the exposed surface portion of the substrate and the insulating pattern. The first silicon layer has an opened seam overlying the previously exposed portion of the substrate. A heat treatment on the substrate is performed at a temperature sufficient to induce silicon migration so as to cause the opened seam to be closed via the silicon migration. A second silicon layer is then formed on the first silicon layer. Thus, surface profile of a floating gate electrode obtained from the first and second silicon layers may be improved.
摘要:
In a method of manufacturing a semiconductor device such as a flash memory device, an insulating pattern having an opening is formed to partially expose a surface of a substrate. A first silicon layer is formed on the exposed surface portion of the substrate and the insulating pattern. The first silicon layer has an opened seam overlying the previously exposed portion of the substrate. A heat treatment on the substrate is performed at a temperature sufficient to induce silicon migration so as to cause the opened seam to be closed via the silicon migration. A second silicon layer is then formed on the first silicon layer. Thus, surface profile of a floating gate electrode obtained from the first and second silicon layers may be improved.
摘要:
A method of forming a dielectric layer having a reduced thickness according to embodiments of the invention includes forming a lower oxide layer on a substrate, and forming a nitride layer on the lower oxide layer. Then, a preliminary oxide layer is formed on the nitride layer. A radical oxidation process using oxygen radicals is performed on the preliminary oxide layer to form an upper oxide layer on the nitride layer. The dielectric layer includes an ONO composite layer consisting of the lower oxide layer, the nitride layer, and the upper oxide layer. Due to the decreased thickness of the dielectric layer, the dielectric layer has an improved capacitance and an increased coupling coefficient.
摘要:
An etch stop layer is formed over a first structure by depositing a metal oxide material over the first structure and annealing the deposited metal oxide material. A second structure is formed over the etch stop layer, and a formation is etched through the second structure using the etch stop layer as an etch stop.
摘要:
An etch stop layer is formed over a first structure by depositing a metal oxide material over the first structure and annealing the deposited metal oxide material. A second structure is formed over the etch stop layer, and a formation is etched through the second structure using the etch stop layer as an etch stop.
摘要:
In a method of forming a shallow trench isolation (STI) region in a semiconductor device, a pad oxide layer and a pad nitride layer may be formed on a semiconductor substrate. The pad nitride layer and pad oxide layer may be patterned to form an isolation region with exposed portions on the pad nitride layer, pad oxide layer and semiconductor substrate. A radical oxide layer may be formed on the exposed portions, and a trench may be formed in the isolation region by etching the semiconductor substrate and radical oxide layer. The STI region may be formed by filling an insulating layer in the trench.
摘要:
Disclosed is a method of manufacturing a MOS transistor having an enhanced reliability. A passivation layer is formed on a gate electrode and on a substrate to prevent a generation of a recess on the substrate. After a mask pattern is formed on the substrate for masking a portion of the substrate, impurities are implanted into an exposed portion of the substrate to form source and drain regions. The substrate is rinsed so that the passivation layer or a recess-prevention layer is substantially entirely or partially removed while the mask pattern is substantially completely removed, thereby forming the MOS transistor. Therefore, the generation of the recess in the source and drain region of the substrate can be prevented due to the passivation layer during rinsing of the substrate.
摘要:
A recessed gate electrode structure includes a first recess and a second recess in communication with the first recess both formed in a substrate. The second recess is larger than the first recess. A gate dielectric layer is formed on a top surface of the substrate and on an inner surface of the first and second recesses. A first polysilicon layer fills the first recess and is doped with impurities at a first impurity density. A second polysilicon layer fills the second recess and is doped with the impurities at a second impurity density. A void is defined within the second polysilicon layer. A third polysilicon layer is formed on the gate dielectric and first polysilicon layers and is doped with the impurities at a third impurity density. Due to impurities in the second polysilicon layer, migration of the void within the second recess may be substantially prevented.
摘要:
A recessed gate electrode structure includes a first recess and a second recess in communication with the first recess both formed in a substrate. The second recess is larger than the first recess. A gate dielectric layer is formed on a top surface of the substrate and on an inner surface of the first and second recesses. A first polysilicon layer fills the first recess and is doped with impurities at a first impurity density. A second polysilicon layer fills the second recess and is doped with the impurities at a second impurity density. A void is defined within the second polysilicon layer. A third polysilicon layer is formed on the gate dielectric and first polysilicon layers and is doped with the impurities at a third impurity density. Due to the presence of impurities in the second polysilicon layer, migration of the void within the second recess may be substantially prevented.
摘要:
A method for cleaning a processing chamber and manufacturing a semiconductor device by removing impurities from a substrate in the processing chamber with a plasma of a first gas including hydrogen gas. After the substrate is removed from the processing chamber, the processing chamber is etched with the plasma of a non-hydrogenous second gas. Thus, the etching selectivity can be improved and the particles are prevented from depositing and/or forming on the substrate.